The Trump administration's newly issued list of immigration principles emphasizes changing federal statutes to tighten up the borders and immigration legal loopholes, but it would also require all companies to use E-Verify.

President Donald Trump sent out a list of principles to Congress on Oct. 10, setting broad boundaries for his immigration reform playing field. The list has to the potential to upset Congressional Democrats, who had thought they had recently reached agreement with the president on some immigration hot buttons, such as young undocumented aliens.

The president told Congress that all U.S. employers should be required to use the U.S. Citizenship and Immigration Services' E-Verify system that checks the Social Security numbers of newly hired employees against Social Security Administration and Department of Homeland Security records to ensure employees have the necessary authorizations to legally work in the country.

Only a handful of states -- Alabama, Arizona, Georgia, Louisiana, Mississippi, North Carolina, South Carolina and Tennessee and Utah -- currently require companies to use E-Verify to screen new hires.

Companies that don't comply with E-Verify would face "strong penalties," while federal contractors that don't comply would face debarment, the president said.

Some Congressional Republicans have been gearing up to make E-Verify mandatory for all U.S. private employers. Back in September, Reps. Lamar Smith (R-Texas), House Judiciary Committee Chairman Bob Goodlatte (R-Va.), and Ken Calvert (R-Calif.) introduced the Legal Workforce Act that would make using the screening mandatory.

They said over 740,000 American employers currently use E-Verify, which "quickly confirms 99.8 percent of work-eligible employees and takes less than two minutes to use."